FRACTURE FLUID AND METHOD FOR TREATING HYDROCARBON RESERVOIRS Russian patent published in 2019 - IPC E21B43/267 C09K8/68 C09K8/70 C09K8/88 

FIELD: technological processes.

SUBSTANCE: invention relates to the treatment of hydrocarbon reservoirs. Method of hydraulic fracturing of ground formation (HFGF) with a borehole passing through it, comprising obtaining a fracturing composition containing a carrier fluid and a component of an ultra-absorbent polymer (UAP) containing one or more of: first proppant composite and a first UAP in non-hydrated form, where the first UAP is at least partially embedded in the free space of the proppant, or coated with an UAP, and the injection of this composition into the subterranean formation to create or increase the fracture. Method of the HFGF, including the preparation of a fracture composition containing a carrier fluid, a proppant, from about 10 pounds (4.536 kg) to about 100 pounds (45.359 kg) of UAP per thousand gal (3785 l) of the composition and from about 1 pound (0.454 kg) to about 30 pounds (13.608 kg) of viscosity modifier per thousand gal (3785 l) composition, where the viscosity modifier contains sulfonated polystyrene (SPS), and injecting this composition into the subterranean formation to create or increase the fracture. Method of the HFGF, including the preparation of a fracture composition containing a carrier fluid, a proppant, from about 30 pounds (13.608 kg) to about 80 pounds (36.287 kg) of a polymer containing one or more of glucomannan konjac (GK) or SPS per thousand gal (3785 l) of composition, and pumping this composition into a subterranean formation to create or increase fractures. Method of the specified HFGF, including obtaining a fracture composition containing a carrier fluid, which is a petroleum-based carrier, linear guar, UAP in hydrated or partially hydrated form, in an amount effective to reduce fluid filtration during a hydraulic fracturing operation, optionally, a crosslinking agent for linear guar, and pumping this composition into the subterranean formation to create or enlarge a crack. Invention is developed in dependent items of the formula.

EFFECT: technical result – improved proppant transfer ability and control of fracture fluid time.

11 cl